단축키

단축키

A facile synthetic strategy has been developed for size-controlled PtCu@Ru nanorattles via co-decomposition of Ru and Cu precursors in the presence of Pt nanoparticles. The presence of Pt nanoparticles induces a fast decomposition of Cu precursors, leading to the growth of the Cu phase on the Pt seeds. The Pt nanoparticle surface is partially alloyed with the Cu phase to form a PtCu alloy phase. Subsequent decomposition of Ru precursors leads to the formation of the Ru shell. The Cu layer between the core and shell of the intermediate PtCu@Cu@Ru nanoparticle, generated as a kinetic product, is then in situ removed by a CTAB (cetyltrimethylammonium bromide)-induced destabilization process to yield a novel nanorattle structure with a Pt-based core and a porous Ru shell. The diameter of the Ru shell could be conveniently controlled by varying the ratio of employed Cu and Ru precursors.

The core/shell-structured upconversion nanophosphors (UCNPs) and Cd-free CuInS2/ZnS
quantum dots (QDs) were synthesized via coprecipitation and hot-injection methods, respectively, and they were applied to near infrar...

A simple yet powerful set of synthetic parameters is identified, leading to concave structures of Pt-based nanoparticles, pursuant to the current demand in high-surface-area nanostructures for catalytic applicatio...

A facile one step route has been developed for the synthesis of trimetallic Cu@RhRu core–shell concave nanooctahedra by co-decomposition of Ru, Rh and Cu precursors. A mechanistic study reveals that nanoparticles with a C...

118. Regiospecific growth of Au on a concave PtZn nanocube to form an Au-PtZn surface mosaic nanocube and an Au-PtZn octapod

K. W. Lee, H. An, S. Haam, H. Baik, K. Lee

CrystEngComm, 2015, 17, 6838. (Hot Article / Back Cover)

Regioselective growth of a heterophase on facet-controlled nanocrystals is an indispensable step towards generation of geometrically well-defined heteronanoarchitectures. The growth of a heterophase usually occurs on the ...

A facile synthetic strategy has been developed for size-controlled PtCu@Ru nanorattles via co-decomposition of Ru and Cu precursors in the presence of Pt nanoparticles. The presence of Pt nanoparticles induces a fast deco...

116. One step synthesis of a hierarchical dendritic Pt nanostructure with the building unit of Pt concave octahedron via simultaneous vertex growth and facet etching

D. Yoon, S. Bang, H. Jin, H. Baik, K. Lee

CrystEngComm, 2015, 17, 6848.

Hierarchical dendritic nanostructures are rare and are usually synthesized by seed mediated epitaxial growth, which requires understanding of the symmetry-directed growth of the epitaxial layer on the facet-controlled nan...

115. One pot synthesis of octahedral CuIr nanocrystals with Ir-rich {111} facets and their usage as efficient water splitting catalyst

D. Yoon, S. Bang, J. Park, J. Kim, H. Baik, H. Yang, K. Lee

CrystEngComm, 2015, 17, 6843.

A facile one pot synthetic route has been developed to obtain octahedral CuIr nanocrystals with Ir-rich {111} facets. Co-decomposition of Cu and Ir precursors in the presence of CTAC (cetyltrimethylammonium chloride) form...

Although the quantum efficiencies of quantum dots (QDs) are approaching unity through advances in the synthesis of QD materials, their luminescence efficiencies after mixing with resin and thermal curing for white light-e...

Copper sulphide materials have received great attention due to their low bandgap semiconducting properties. As compared to other chalcogenides, few synthetic examples have been reported, and a simple and scalable syntheti...

111. Formation of double layer hollow nanostars of Pd/CuIr by utilizing a Kirkendall effect and a facile Cu atom movement along twinning boundaries and their usage as efficient water splitting catalysts

S. Bang, D. Yoon, J. Kim, H. Baik, H. Yang, K. Lee

CrystEngComm, 2015, 17, 4084.

Hollow nanostructures with an inherent high surface area per mass are attractive candidates as economically viable catalysts. Conceptually, a hollow nanostructure can be obtained by forming a desired material phase on a r...

Simultaneously growing multiple nanocrystallites in a crowded space can cause a shortage of precursors, and this can lead to a vertical growth of nanocrystallites on a given substrate. The presence of surfactant–surfactan...

Vesicular pH modulates the function of many organelles and plays a pivotal role in cell metabolism processes such as proliferation and apoptosis. Here, we introduce a simple colorimetric redox-polyaniline nanoindicator, w...

Catalytic properties of nanoparticles can be significantly enhanced by controlling nanoscale alloying and its structure. In this work, by using a facet-controlled Pt@Ni core–shell octahedron nanoparticle, we show that the...

106. Facet-controlled {100}Rh–Pt and {100}Pt–Pt dendritic nanostructures by transferring the {100} facet nature of the core nanocube to the branch nanocubes

N. T. Khi, J. Park, H. Baik, H. Lee, J,-H. Sohn, K. Lee

Nanoscale, 2015, 7, 3941. (Hot Paper)

Facet-controlled dendritic nanostructures are expected to exhibit excellent catalytic properties because both aggregation-free nature and controlled facet-originated activity and selectivity can be accomplished. However, ...

Impurity doping has yielded a number of useful optical and catalytic alloy nanoparticles, by providing synthetic routes to unprecedented nanostructures. However, Zn is difficult to use as a dopant in alloy nanoparticles due to ...

This review mainly describes the theranostic research with nanomaterials since 2006, when nanomaterials started to be used extensively in the development of theranostic systems. First, a brief history of molecular imaging and person...

Co-decomposition of Pd and Pt precursors in the presence of trioctylphosphine and stearic acid gives a unique non-spherical PdPt@Pt core–shell nanospike with multiple grain boundaries in a facile one-pot synthesis. The differen...

Surface-energy fine-tuned five-fold twinned nanostructures with a core–shell Pt3Ni@Rh structural motif, namely, a core–shell Pt3Ni@Rh pentagon, a core–shell Pt3Ni@Rh starfish, and a paddlewheel with a Pt3Ni crankshaft and two Rh five...

Pt-doping of an ultrathin Pd nanosheet results in the unprecedented structural rearrangement of a Pd nanosheet into a PdPt nanotent structure, in which a tripod stands on a triangular nanosheet. Further growth of Pt phase on ...

Twinning boundary-elongated hierarchical Pt nanostructures with excellent electrocatalytic activity were prepared by using axially twinned Pt3Ni nanorods as the platform for epitaxial transfer of a twinned crystal structure. The hig...

Ultralong coaxial Au@Pt nanocables prepared by one-pot synthesis exhibit excellent electrocatalytic activity due to structural features of (1) numerous twinning boundaries and (2) lattice mismatch between the core and the shell.

Here, we report a nanotheranostic system that enables simultaneous imaging and therapy of HER2-overexpressing tumors. We first screened an aptide-based phage library for HER2-specific peptide ligands, identifying a HER2-specific ap...

The first demonstration of polymer nanowire (PNW) crystals based on a diketopyrrolopyrrole-based copolymer (i.e., PDTTDPP), and their application to field-effect transistors (FETs) is reported. Remarkably, transmission electron micro...

Hollow Mn-doped iron oxide nanocontainers, formed by a novel one-pot synthetic process, fulfill the dual requirements of delivering an effective dose of an anticancer drug to tumor tissue and enabling image-contrast monitoring of the...

091. Axially twinned Nanodumbbell with a Pt bar and two Rh@Pt balls designed for high catalytic activity: Transferring the twinned crystallographic structure from the Pt bar to the entire dumbbell

A fail-proof synthetic strategy has been developed for a multiply twinned dumbbell-shaped Rh@Pt nanostructure, which exhibits a superior electrocatalytic activity for methanol oxidation reaction. The unusually high electrocatalytic a...

090. Delivery of cancer therapeutics using nanotechnology

E.-K. Lim, E. Jang, K. Lee, S. Haam, Y.-M. Huh

Pharmaceutics, 2013, 5, 294

Nanoparticles have been investigated as drug carriers, because they provide a great opportunity due to their advantageous features: (i) various formulations using organic/inorganic materials, (ii) easy modification of targeting molecules, dr...

088. Magnetic nanocomplexes and the physiological challenges associated with their use for cancer treatment

E. Kim, K. Lee, Y.-M. Huh, S. Haam

J. Mater. Chem. B, 2013, 1, 729

Magnetic nanoparticles offer potential advances in cancer treatment. One example is cancer theranostics, which refers to the combination of a diagnostic tool, i.e., magnetic resonance (MR) imaging, and therapeutic entities such as dr...

087. Evolution of space-efficient and facet-specific ZnO 3-D nanostructures and their application in photocatalysis

S. Kim, M. Kim, T. Kim, H. Baik, K. Lee

CrystEngComm, 2013, 15, 2601 (Cover Paper)

We report new structural designs to dramatically increase the surface area of the ZnOnanostructure without compromising the small volume much. Space-efficient and facet-specific ZnO 3-D nanostructures, namely {101}-stacked nanocones ...

The surface energy of a nanoparticle accounts for a significant fraction of the whole nanoparticleenergy and its contribution becomes more important as the nanoparticle size gets smaller. In short, a nanoparticle becomes more unstabl...

Bone marrow–derived mesenchymal stromal cells (MSCs) have been used successfully as a source of stem cells for treating neurodegenerative diseases. However, for reasons that are not clear, autologous MSC transplants have not yielded successf...

In this study, we report the simple and sensitive electrochemical detection of dopamine in the presence of excess ascorbic acid. The detection is based on the spontaneous formation of electrocatalytic poly(dopamine) films on ba...

Image enhancement: Core–shell MnO@Mn3O4 urchin-shaped nanoparticles can be synthesized by means of an anisotropic etching process and used as a pH-activatable T1 contrast agent for magnetic resonance imaging. The manganese ions re...

The synchronization of gene expression and cell trafficking in transfected stem cells is crucial for augmentation of stem cell functions (differentiation and neurotropic factor secretion) and real time in vivo monitoring. We report a...

pH-sensitive drug-delivering magnetic nanoparticles (DMNPs) have been developed as theragnostic nanocarriers that release doxorubicin (DOX) under acidic conditions within cancer cells. The drug release kinetics of the DMNPs, combined...

For the application of gadolinium oxide (Gd2O3) nanoparticles as terahertz contrast agents, their optical properties in a solvent were studied using terahertz time-domain spectroscopy. The power absorption and refractive index of the samples...

Infiltrate and destroy: In an environment rich in protonating or oxidative species, such as the intracellular milieu of cancer cells, the main absorption band of spherical, water-soluble polyaniline nanoparticles was red-shifted t...